Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Puppis |
Right ascension | 08h 13m 19.96710s [1] |
Declination | −15° 47′ 17.6008″ [1] |
Apparent magnitude (V) | 4.99 [2] |
Characteristics | |
Spectral type | G4 Ib-II [3] |
U−B color index | +0.78 [2] |
B−V color index | +1.07 [2] |
Astrometry | |
Radial velocity (Rv) | +16.80 [4] km/s |
Proper motion (μ) |
RA: −12.718
[1]
mas/
yr Dec.: −4.270 [1] mas/ yr |
Parallax (π) | 3.2906 ± 0.1404 mas [1] |
Distance | 990 ± 40
ly (300 ± 10 pc) |
Absolute magnitude (MV) | −2.12 [5] |
Details | |
Mass | 5.2±0.2 [6] M☉ |
Radius | 47.60+1.55 −1.16 [1] R☉ |
Luminosity | 1,087.12±53.98 [1] L☉ |
Surface gravity (log g) | 0.80 [7] cgs |
Temperature | 4,804+59 −77 [1] K |
Metallicity [Fe/H] | −0.18 [5] dex |
Rotational velocity (v sin i) | 6.9 [8] km/s |
Age | 90 [6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
20 Puppis is a solitary [10] star in the southern constellation of Puppis. It is visible to the naked eye as a faint, yellow-hued star with an apparent visual magnitude of 4.99. [2] The star lies approximately 990 light years away from the Sun based on parallax. It is receding from the Earth with a heliocentric radial velocity of +16.8 km/s. [4]
This object has a stellar classification of G4 Ib-II, [3] matching a G-type star with a luminosity class part way between a bright giant and a supergiant star. It is just 90 [6] million years old with around five [6] times the mass of the Sun. The star has expanded to 48 [1] times the Sun's radius and is radiating 1,087 [1] times as much luminosity as the Sun from its enlarged photosphere at an effective temperature of 4,804 K. [1]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Puppis |
Right ascension | 08h 13m 19.96710s [1] |
Declination | −15° 47′ 17.6008″ [1] |
Apparent magnitude (V) | 4.99 [2] |
Characteristics | |
Spectral type | G4 Ib-II [3] |
U−B color index | +0.78 [2] |
B−V color index | +1.07 [2] |
Astrometry | |
Radial velocity (Rv) | +16.80 [4] km/s |
Proper motion (μ) |
RA: −12.718
[1]
mas/
yr Dec.: −4.270 [1] mas/ yr |
Parallax (π) | 3.2906 ± 0.1404 mas [1] |
Distance | 990 ± 40
ly (300 ± 10 pc) |
Absolute magnitude (MV) | −2.12 [5] |
Details | |
Mass | 5.2±0.2 [6] M☉ |
Radius | 47.60+1.55 −1.16 [1] R☉ |
Luminosity | 1,087.12±53.98 [1] L☉ |
Surface gravity (log g) | 0.80 [7] cgs |
Temperature | 4,804+59 −77 [1] K |
Metallicity [Fe/H] | −0.18 [5] dex |
Rotational velocity (v sin i) | 6.9 [8] km/s |
Age | 90 [6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
20 Puppis is a solitary [10] star in the southern constellation of Puppis. It is visible to the naked eye as a faint, yellow-hued star with an apparent visual magnitude of 4.99. [2] The star lies approximately 990 light years away from the Sun based on parallax. It is receding from the Earth with a heliocentric radial velocity of +16.8 km/s. [4]
This object has a stellar classification of G4 Ib-II, [3] matching a G-type star with a luminosity class part way between a bright giant and a supergiant star. It is just 90 [6] million years old with around five [6] times the mass of the Sun. The star has expanded to 48 [1] times the Sun's radius and is radiating 1,087 [1] times as much luminosity as the Sun from its enlarged photosphere at an effective temperature of 4,804 K. [1]